Damper



(No Mdel.)

2 Sheets-Sheet 1.- J. E. GAITLEY.

DAMPER.

Patented May 28, 1895.

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J. E. GAITLEY. DAMEER. No. 540,049. Patented May 28,1895.

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-pipe in elevation.

`Uivrriin STATES PATENT Gretna.

'JOHN E. GAITLEY, or TROY, NEW YORK.

DANI PER.

SPECIFICATION forming part 0f Letters Patent NO. 540,049, dated May 28, 1895.

Application filed November 30, 1894. Serial No. 530,373. (No model.)

To a/ZZ whom it may concern: V

Be it known that I, JOHN E. GAITLEY,a citizen of the United States, residing at Troy, county of Rensselaer, and Stante of New York, have invented certain new 'and useful Improvements in Dampers,of which the following is a speciiication.

The invention relates to such improvements and consists of the novel construction and combination of parts hereinafter described and subsequently claimed.

Reference may be had to the accompanying drawings, and the letters of reference marked thereon, which form a part of this specification.

Similar letters refer to similar parts in the several igures.

Figure 1 of the drawings is an end View of a section of pipe, showing my improved damper in a closed position, as in use. Fig. 2 is a central section of the parts shown in Fig. 1, taken on the broken line 2 2 in Fig. l. Fig. 3 is a vertical section of the damper-disk, taken on the broken line 3 3 in Figs. 1 and 2, showing the disk-offset and a portion of the Fig. 4 is a similar section of the vdisk detached. Fig. 5 is a horizontal cross-section of the offset, taken on the broken line 5 5 in Fig. 4. Fig. 6 is an elevation of the disk-offset similar to that seen in Fig. 4, showing a step in the process of manufacture. Fig. 7 is an interior plan view of the cupshaped washer detached. Fig. 8 is a side elevation of same. Fig. 9 is a sideI elevation of the coil-spring detached.

My invention relates to that class of dampers wherein the damper-disk is supported by a short operating spindle passed through one side of the pipe, and consists in providing the disk and spindle with interlocking and supporting offsets, and means for detachably maintaining the parts in a locked position for use.

A- is a short length or section of pipe, and B thedamper-disk which is preferably made of sheet-metal. The disk is shaped to correspond with the cross-sectional form of the pipe, and provided with a strengthening corrugation B-u and usual central opening 132-. The disk is also provided on one side or edge with a countersink or well BB- and an offset B4 projected from the bottom of the countersink at right angles to the plane of the disk,` `and integral with the disk. The countersink and offset are formed by suitable swaging dies. The offset is provided with a central elongated aperture B5- adapted to receive the supporting spindle C- which is inserted therethrough and through a similar aperture inthe pipe, the disk having been previously located within the pipe. VThe pipe-aperture is shown in Figs. 2 and 3. The inserted end of the spindle is also provided with a pair of oppositely-projecting offsets C-.

The spindle is inserted with its offsets projecting lengthwise of the elongated 'aperture in the disk-offset. After the spindle is inserted, it is given a quarter-turn rotatively which projects the spindleoffsets transversely of theaper'ture and causes them to engage with the aperture-walls when the spindle is pressed outwardly, thereby causing the spindle and disk offsets to interlock with each other. l

As a means for maintaining the osets in an interlocked position, and for supporting the parts in the pipe in position for use,l provide the outer end of the spindle with an operating handle C2- and insert a coil-spring D- between the handle and pipe in line with the disk-offset.

In assembling the parts, the spindle is ini serted through the coil-spring before its insertion in the pipe. The coil is of such a length as to cause its compression when the offsets are interlocked, whereupon the resilient force of the spring not only maintains the offsets in engagement with each other, but forces the disk-olfset against the inner surface of the pipe with sufficient strength to maintain the disk in the desired position. When desired, the cup-washer E- provided with the elongated aperture E- adapted to receive the spindle-offsets may be interposed IOC engage opposite sides of the spindle oli'fsets,

as shown, and prevent a rotary movement of the spindle relatively to the damper-disk. The

coil-spring prevents the escape of the spindle offsets from their seats between the lugs while in use, but when it is desired for any cause to remove the damper from the pipe, the spindle osets can be forced out from between the lugs by pushing inwardlynpon the handle of the spindle and compressing the spring. The spindle can then be given a quarter-turn and withdrawn.

My improved damper disk is formed from a single piece of sheet-metal by first cutting from the formed offset its central portion forming the aperture B8, then cutting through or partly through the offset on the lines B9- and lastly bending outwardly from the face of the olset those portions of the sheet-metal inclosed on three sides by the cut edges, to form the lugs B7- and at the same time the elongated aperture. The conntersink in the edge of Athe disk permits of forming an offset which can be provided with an approximately central spindle-aperture in the plane of the disk-body extended.

The integral sheetmetal damper disk,

formed as above described,constitutes an improved article of manufacture which can be separatelyv supplied to the trade to be sold for use with various styles of handle adapted to be secured to the disk in substantially the manner herein shown and described.

What I claim as new, and desire to secure by Letters Patent, is

4Aslan improved article of manufacture a disk for dam pers comprising an integral piece of sheet-metal having a die-formed countersink in one edge, an offset struck up from the outer end of the countersink and having a central elongated aperture, and two pairs of 

